243021012 has 72 divisors (see below), whose sum is σ = 622569696. Its totient is φ = 73335552.

The previous prime is 243021007. The next prime is 243021017. The reversal of 243021012 is 210120342.

It is an interprime number because it is at equal distance from previous prime (243021007) and next prime (243021017).

It is a junction number, because it is equal to n+sod(n) for n = 243020982 and 243021000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243021017) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1773808 + ... + 1773944.

Almost surely, 2^243021012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243021012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311284848).

243021012 is an abundant number, since it is smaller than the sum of its proper divisors (379548684).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243021012 is a wasteful number, since it uses less digits than its factorization.

243021012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 377 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

The square root of 243021012 is about 15589.1312137656. The cubic root of 243021012 is about 624.0431327022.

Adding to 243021012 its reverse (210120342), we get a palindrome (453141354).

The spelling of 243021012 in words is "two hundred forty-three million, twenty-one thousand, twelve".